Latch assembly that facilitates the insertion and removal of a battery module from an electronic device

ABSTRACT

A technique that facilitates the removal of a battery module from a variety of electronic devices, such as portable computers. The technique utilizes a latch having a lifting mechanism that forces the battery module to a lifted position. Upon reaching the lifted position, retention features on the lift mechanism and the battery module engage to hold the battery module in the lifted position. At this lifted position, the battery module is readily gripped and removed.

CROSS REFERENCE TO RELATED APPLICATIONS

This is a continuation of application Ser. No. 09/929,298 filed on Aug. 14, 2001 now U.S. Pat. No. 6,678,154.

FIELD OF THE INVENTION

The present invention relates generally to electronic devices, such as portable computers, that utilize a battery module, and particularly to a latch mechanism that facilitates removal of the battery module.

BACKGROUND OF THE INVENTION

A variety of electronic devices, such as portable computers, include a battery module that may be used to power the device, at least when an electrical outlet is not available. The battery module often is mounted in an appropriately sized recess formed in an outer housing of the device. A retention mechanism is used to hold the battery module in place until desired removal for servicing, charging, replacement or substitution with a fully charged battery module.

In many applications, the battery module is disposed in the recessed area such that its outer surface is flush with an outer surface, e.g. bottom surface, of the device. A latch is used to permit release of the battery for removal. However, even when the latch is moved to an open or release position, the battery can be hard to grasp for removal. In some designs, the battery is forced or allowed to move outwardly upon movement of the latch to the open position, but the battery returns to its recessed position upon release of the latch. Accordingly, removal of the battery becomes a “two-hand” operation in which one hand actuates and holds the latch mechanism while the other hand is used to grip and remove the battery. It would be advantageous to simplify this procedure.

SUMMARY OF THE INVENTION

The present invention features a technique that facilitates removal of a battery module from an electronic device, such as a portable computer. The technique utilizes an electronic device having a housing with a battery module receptacle. A battery module is sized for receipt in the receptacle and held in place by a latch. The latch comprises a lifting mechanism that is positioned to engage and lift the battery upon actuation. The lifting mechanism utilizes a retention feature to retain the battery in a lifted position even upon release of the latch.

BRIEF DESCRIPTION OF THE DRAWINGS

The invention will hereafter be described with reference to the accompanying drawings, wherein like reference numerals denote like elements, and:

FIG. 1 is a front perspective view of an exemplary portable computer, according to one embodiment of the present invention;

FIG. 2 is a view similar to FIG. 1 but showing a raised display screen;

FIG. 3 is a bottom view of the device illustrated in FIG. 1;

FIG. 4 is an enlarged view of the battery module and latch illustrated in FIG. 3;

FIG. 5 is a cross-sectional view taken generally along line 5-5 of FIG. 3 and showing the lift mechanism associated with the latch illustrated in FIG. 4 in which the lift mechanism is in a closed position;

FIG. 6 is a view similar to FIG. 5 but showing the lift mechanism engaging the battery module;

FIG. 7 is a view similar to FIG. 5 but showing the lift mechanism holding the battery module in a lifted position;

FIG. 8 is an exploded view of the latch; and

FIG. 9 is a view similar to FIG. 8 but showing the components in assembled form.

DETAILED DESCRIPTION OF EXEMPLARY EMBODIMENTS

Referring generally to FIG. 1, an exemplary electronic device 10 is illustrated. In this embodiment, electronic device 10 is a portable computer and in particular a laptop or notebook computer. Such portable computing devices are examples of devices that incorporate and benefit from features of the present invention. However, the illustrated device is used an example only and should not be construed as limiting the scope of the invention to these specific electronic devices. Hereinafter, electronic device 10 is referred to as portable computer 10 to facilitate explanation of the present invention.

Portable computer 10 comprises a base housing 12 coupled to a display 14. Display 14 may be moved between a closed position, as illustrated best in FIG. 1, and an open position, as illustrated best in FIG. 2. In the example illustrated, display 14 is coupled to base housing 12 by a hinge 16 that permits display 14 to be pivoted between the open and closed positions.

Base housing 12 typically has a bottom wall 18, a top deck 20 and a plurality of side walls 22 that generally extend between bottom wall 18 and top deck 20. Base housing 12 encloses a motherboard 24 disposed between bottom wall 18 and top deck 20. As is known to those of ordinary skill in the art, a variety of components, including one or more microprocessors, memory modules, drivers, etc. may be coupled to motherboard 24. Additionally, base housing 12 may be designed to provide openings for a variety of ports 26 and drives 28. The actual type and number of ports, drives and other features will vary with the design objectives of a given device.

As illustrated best in FIG. 2, portable computer 10 also includes one or more user interfaces, such as a mouse pad 30 having a plurality of control buttons 32. Another exemplary interface may include a keyboard 34 having a plurality of input keys 36. Portable computer 10 also may include a variety of other features, such as speakers 38 to provide audio output.

Display 14 may comprise a variety of displays designed to provide graphical information to a user. An exemplary display 14 is a flat screen display having a screen 40 on which graphical information is viewed.

Referring generally to FIGS. 3 and 4, power may be provided to portable computer 10 by a battery module 42. In the embodiment illustrated, battery module 42 is received in an appropriately sized receptacle 44 formed in bottom wall 18. Battery module 42 has an exposed surface 46 that lies generally flush with the lower surface of bottom wall 18. In this embodiment, exposed surface 46 is generally the lower or bottom surface of battery module 42.

Battery module 42 is held in place by a latch mechanism 48, as best illustrated in FIG. 4. Latch mechanism 48 comprises a slide member 50 having a series of raised grips 52. Slide member 50 may be engaged by a thumb or finger for sliding movement along a track 54. Slide member 50 is moved between a closed position 56 (see FIG. 4) and an open position 58 that permits removal of battery module 42. Latch mechanism 48 may incorporate a variety of holding mechanisms to maintain battery module 42 securely within receptacle 44 when slide member 50 is in closed position 56. For example, a variety of portable computers available from Compaq Computer Corporation utilize a latch mechanism designed to securely hold a battery module within its recessed receptacle of the portable computer housing.

In the present case, however, latch mechanism 48 incorporates a lifting mechanism 60, as illustrated in FIGS. 5, 6 and 7. Lifting mechanism 60 is designed to engage and lift battery module 42 to a lifted position, as illustrated best in FIG. 7. Lifting mechanism 60 also is designed for retaining battery module 42 in this lifted position to permit easy removal by a user. In fact, the operation only requires one hand, because the user can move slide member 50 to open position 58 which raises and holds battery module 42 in the lifted position. The user may then grip and remove the battery module with the same hand used to operate slide member 50.

Latch mechanism 48 comprises a carriage 62 that is slidably mounted in base housing 12. Carriage 62 is coupled to slide member 50 such that movement of slide member 50 causes movement of carriage 62. At least one lift tab 74 and preferably a pair of lift tabs 74 are connected to carriage 62, as best illustrated in FIG. 5. Lift tabs 74 are positioned to engage and move battery module 42 to its lifted position. In the embodiment illustrated, each lift tab has a leading, sloped surface 76 positioned to engage battery module 42 as slide member 50 is moved towards open position 58, as illustrated best in FIG. 6.

Each lift tab 74 further comprises a retention feature 78, such as an outwardly extending tab, designed to hold battery module 42 in a lifted position even after release of slide member 50, as illustrated best in FIG. 7. Specifically, movement of slide member 50 from closed position 56 to open position 58 forces the sloped surface 76 of each lift tab 74 against an appropriate portion of battery module 42, thereby moving battery module 42 outwardly to its fully lifted position. At this lifted position, retention feature 78 engages the battery module 42 to maintain the battery module in such position.

In the specific embodiment illustrated, battery module 42 comprises one or more corresponding bosses 80 each positioned for engagement by a corresponding sloped surface 76 of lift tab or tabs 74. Each boss 80 comprises a generally curved engagement surface 82 designed to slide along a corresponding slope surface 76. Each boss 80 further comprises a retention notch 84 designed and positioned to engage retention feature 78. Thus, as slide member 50 is moved to open position 58, sloped surfaces 76 slide against engagement surfaces 82 forcing battery module 42 to its lifted position. Upon reaching the lifted position, each retention notch 84 slides past its corresponding retention feature 78, and the battery module 42 is held in the lifted position, as best illustrated in FIG. 7.

When battery module 42 is lifted from receptacle 44, each retention notch 84 is disengaged from its corresponding retention feature 78 and slide member 50 is allowed to return to its closed position 56. A biasing member may be used to bias slide member 50 back towards its closed position to facilitate automatic closure of latch mechanism 48. For example, a spring 86 may be utilized to automatically force slide member 50 to closed position 56, as illustrated in FIG. 8 and 9.

Although the carriage design may be adapted to a variety of specific applications, one exemplary design is illustrated in FIGS. 8 and 9. Specifically, carriage assembly 62 includes a pair of slide openings 88. A pair of fasteners 90 extend through slide openings 88 and capture carriage assembly 62 between expanded head portions 92 and mounting bosses 94 located on housing 12 (see FIG. 8). Mounting bosses 94 are disposed generally on opposite ends of track 54 and include appropriate openings 96, such as threaded openings, for threadably receiving fasteners 90.

Spring 86 is captured between a retention feature 98 disposed on housing 12 and a retention feature 100 disposed on carriage assembly 62. Thus, spring 86 acts between carriage assembly 62 and housing 12 to bias the carriage assembly and slide member 50 to the closed position.

Slide member 50 is coupled to carriage assembly through track 54. For example, slide member 50 may comprise a pair of flexible fingers 102 each having a retention end 104 (see FIG. 8) that may be inserted through track 54 and through a corresponding opening 106 formed in carriage assembly 62. When retention ends 104 of fingers 102 are inserted through opening 106, the retention ends are able to grip carriage assembly 62 (see FIG. 9) such that sliding movement of slide member 50 causes corresponding sliding movement of carriage assembly 62.

It will be understood that the foregoing description is of preferred embodiments of this invention, and that the invention is not limited to the specific forms shown. For example, the battery lifting mechanism may be incorporated into a variety of electronic devices; the design of the lift tabs and carriage assembly may be adjusted from one device to another; the configuration of the battery module may change; a variety of known latch mechanisms may be utilized to hold the battery module in its corresponding receptacle; the latch mechanism may be utilized with batteries that are inserted and removed through a side region of a device as opposed to a bottom or top region; and the lifting mechanism may incorporate one or more features that provide the lifting force. These and other modifications may be made in the design and arrangement of the elements without departing from the scope of the invention as expressed in the appended claims. 

1. A component mount for a computer, comprising: a component latch movable between a latched configuration and an unlatched configuration; a plurality of bosses; and a lifter engageable with the plurality of bosses to move a component to a lifted position in the unlatched configuration, wherein the plurality of bosses comprise a retention structure retainable against a mating retention structure of the lifter to retain the component in the lifted position, the retention structure and the mating retention structure comprises angled abutment surfaces, and the angled abutment surfaces are substantially parallel to one another and are substantially perpendicular to a direction of movement between the retention structure and the mating retention structure.
 2. The component mount of claim 1, wherein the angled abutment surfaces comprise a notch and a tab.
 3. The component mount of claim 1, wherein the lifter comprises at least one angled surface leading to the mating retention structure.
 4. The component mount of claim 3, wherein the plurality of bosses comprise a curved engagement surface disposed against the at least one angled surface.
 5. The component mount of claim 1, wherein the mating retention structure of the lifter is configured to block movement of the plurality of bosses from the lifted position to a recessed position.
 6. The component mount of claim 1, wherein the lifter comprises a plurality of lift tabs.
 7. The component mount of claim 6, wherein one of the plurality of lift tabs comprises a substantially flat recessed surface, which is configured to support one of the plurality of bosses when the component is in the lifted position.
 8. A component mount for a computer, comprising: a component latch movable between a latched configuration and an unlatched configuration; a lifter having a sloped structure leading to an inwardly angled structure; and a boss movable along the sloped structure to a lifted position at the inwardly angled structure, whereat a mating angled structure of the boss is retainable against the inwardly angled structure, wherein the inwardly angled structure and the mating angled structure comprise substantially flat abutment surfaces that are substantially angled relative to a direction of movement between the inwardly angled structure and the mating angled structure.
 9. The component mount of claim 8, wherein the inwardly angled structure comprises a notch.
 10. The component mount of claim 8, wherein the mating angled structure comprises an outwardly extending tab.
 11. The component mount of claim 8, wherein the boss comprises a curved engagement surface disposed against the sloped structure.
 12. The component mount of claim 8, comprising at least one additional lifter and at least one additional boss, which is movable by the at least one additional lifter to the lifted position.
 13. The component mount of claim 12, wherein the least one additional lifter and the at least one additional boss comprise retention structures, which are retainable against one another at the lifted position.
 14. The component mount of claim 8, wherein the inwardly angled structure of the lifter is configured to block movement of the boss from the lifted position to a recessed position.
 15. A removable computer component, comprising: a component housing insertable into a receptacle of a computer chassis; and a component mount at least partially disposed on the component housing and at least partially mountable in the computer chassis, the component mount comprising: a component latch movable between a latched configuration and an unlatched configuration; a lifter having a sloped structure leading to an angled retention structure; and a boss movable along the sloped structure to a lifted position at the angled retention structure, whereat a mating angled structure of the boss is retainable against the angled retention structure, wherein the angled retention structure and the matins angled structure comprise substantially flat abutment surfaces that are substantially angled relative to a direction of movement between the angled retention structure and the mating angled structure.
 16. The removable computer component of claim 15, wherein the component housing comprises a battery module.
 17. The removable computer component of claim 15, wherein one of the angled retention structure and the mating angled structure comprises a notch, and a mating one of the angled retention structure and the mating angled structure comprises an outwardly extending tab.
 18. The removable computer component of claim 15, wherein the angled retention structure and the mating angled structure comprise substantially parallel abutment surfaces.
 19. The removable computer component of claim 15, comprising at least one additional lifter and at least one additional boss, which is movable by the at least one additional lifter to the lifted position.
 20. The removable computer component of claim 19, wherein the least one additional lifter and the at least one additional boss comprise retention structures, which are retainable against one another at the lifted position.
 21. The component mount of claim 15, wherein the angled retention structure of the lifter is configured to block movement of the boss from the lifted position to a recessed position.
 22. A removable computer component, comprising: a component housing insertable into a receptacle of a computer chassis; and a component mount at least partially disposed on the component housing and at least partially mountable in the computer chassis, the component mount comprising: a latching mechanism movable to latch and unlatch the component housing with the receptacle; and a boss movable by a sloped surface of a lifting mechanism to move the component housing to a lifted position, whereat retention structures of the boss and the lifting mechanism are engageable to support the component housing in the lifted position, wherein the retention structures comprise substantially flat abutment surfaces that are substantially angled relative to a direction of movement between the retention structures.
 23. The removable computer component of claim 22, wherein the component housing comprises a battery module.
 24. The component mount of claim 22, wherein the retention structures are configured to block movement of the boss from the lifted position to a recessed position.
 25. A computer chassis, comprising: a recessed structure adapted to receive a computer component; a component mount at least partially positioned in the recessed structure and at least partially mountable to the computer component, the component mount comprising: a component latch movable between a latched configuration and an unlatched configuration; a lifter having a sloped structure leading to an angled retention structure; and a boss movable along the sloped structure to a lifted position at the angled retention structure, whereat a mating angled structure of the boss is retainable against the angled retention structure, wherein the angled retention structure and the mating angled structure comprise substantially flat abutment surfaces that are substantially angled relative to a direction of movement between the angled retention structure and the mating angled structure.
 26. The computer chassis of claim 25, wherein the recessed structure is disposed within a portable computer housing.
 27. The computer chassis of claim 25, comprising a motherboard and a processor mounted to the motherboard.
 28. The computer chassis of claim 25, comprising a display coupled to a component housing having the recessed structure.
 29. The computer chassis of claim 25, wherein the recessed structure comprises battery connectors engageable with mating connectors of the computer component.
 30. The computer chassis of claim 25, wherein one of the angled retention structure and the mating angled structure comprises a notch, and a mating one of the angled retention structure and the mating angled structure comprises an outwardly extending tab.
 31. The computer chassis of claim 25, comprising at least one additional lifter and at least one additional boss, which is movable by the at least one additional lifter to the lifted position.
 32. The component mount of claim 25, wherein the angled retention structure of the lifter is configured to block movement of the boss from a lifted position to a recessed position.
 33. A computer chassis, comprising: a recessed structure adapted to receive a computer component; a component mount at least partially positioned in the recessed structure and at least partially mountable to the computer component, the component mount comprising: a latching mechanism adapted to latch and unlatch the computer component with the recessed structure; and a boss movable by a sloped surface of a lifting mechanism to move the component housing to a lifted position, whereat retention structures of the boss and the lifting mechanism are engageable to support the component housing in the lifted position, wherein the retention structures comprise substantially flat abutment surfaces that are substantially angled relative to a direction of movement between the retention structures.
 34. The computer chassis of claim 33, wherein the recessed structure is disposed within a portable housing having a panel display.
 35. The computer chassis of claim 33, wherein the recessed structure comprises battery connectors engageable with mating connectors of the computer component.
 36. The computer chassis of claim 33, wherein the retention structures comprise a notch and an outwardly extending tab.
 37. The component mount of claim 33, wherein the retention structures are configured to block movement of the boss from the lifted position to a recessed position. 